I ran into an older gentleman that was admiring my 1978 Cadillac. He asked me what gas I run in it and I told him 87 regular. He then told me that 87 octane pump gas has alcohol in it which is bad for the fuel system on older cars. He advised me to run 89 octane instead.
So...... I'm always skeptical when I hear something from just one person, of course. But he knew a lot about old Cadillacs and is a collector himself. What's the consensus here? I really don't want to burn more expensive gas if I don't need to, but I certainly will if neglecting to do so will ruin my fuel system .
So...... I'm always skeptical when I hear something from just one person, of course. But he knew a lot about old Cadillacs and is a collector himself. What's the consensus here? I really don't want to burn more expensive gas if I don't need to, but I certainly will if neglecting to do so will ruin my fuel system .